I guess I'm argumentative today. I disagree with this post too. Being
"stepless" has nothing to do with being "consistent".
Let's talk about a manual exposure first. Set an "OM-4" in manual mode 1/60,
dial the aperture until it perfectly matches, let's say it's an oddball
aperture like f/14.2 , okay? You take your first picture of the very dark wall
of a building in open shade and include a taxi at the far left corner. Without
changing the controls in any way, you rotate to your left and take another
frame, of mostly bald sky, with the taxi on the right. The taxi is exposed
exactly the same in both frames. You have two exposures which *match* each
other. They are *consistent* with each other. They can be stitched seamlessly
with panorama software. Objects that are common to the two frames are exposed
*exactly* the same. That's what "consistent" means. It means repetition
without variation.
*****************
On the other hand, if you use the OM-4 in Auto mode, you would get a
steplessly- selected shutter speed. Let's say you have the lens clicked into
the f/16 detent and the first exposure is 1/52th of a second for the sake of
the discussion. When you turn to the left, assuming you don't make any changes
to the camera (other than wind-on!) the bald sky now gives you a radically
different exposure. It's steplessly selected but it has *nothing* to do with
the first exposure. The taxi is not the same tone in both frames. You would
have a very hard time stitching it because the two exposures are not consistent
with each other. Slide shooters know *EXACTLY* what I'm talking about.
Lama
> From: "C.H.Ling" <chling@xxxxxxxxxxxxx>
> Yes, and the shutter is in stepless mode so you get very consistent
> exposure. This can't be done in manual model where you can only select
> full stop.
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